RtwqAddPeriodicCallback function (rtworkq.h)

Sets a callback function to be called at a fixed interval.

Syntax

HRESULT RtwqAddPeriodicCallback(
  [in]            RTWQPERIODICCALLBACK Callback,
                  IUnknown             *context,
  [out, optional] DWORD                *key
);

Parameters

[in] Callback

Pointer to the callback function.

context

Pointer to a caller-provided object that implements IUnknown, or NULL. This parameter is passed to the callback function.

[out, optional] key

Receives a key that can be used to cancel the callback. To cancel the callback, call RtwqRemovePeriodicCallback and pass this key as the dwKey parameter.

Return value

If this function succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Requirements